Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
ADDED: Any addition board layers can be plotted on all selected board layer
when plotting.
CHANGED: The new plot to all layers feature made the plot edge cuts option
obsolete. Users must now select the edge cuts layer from the list of
plot to all layer selections to include edge cuts on all layers when
plotting.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/2449
